Connection plug



May 15, 1923. 4 v w. E. PRICE CONNECTION PLUG Filed May 12, 1920 v 51mmWilliam Edison Price ments in Connection Plugs, of which the in theprovision of a connection warren mm arana-r @FFEQE- WILLIAM EDISONPRICE, OI NEW YORK, N Y.

CONNECTION PLUG.

Application filed may 12, 1920. 1; Serial No. 380,749.

To all whom it may concern:

Be it known that I, \VILLIAM EmsoN PRICE, a citizen of the UnitedStates, and resident of the borough of Manhattan, city, county, andState. of New York, have invented certain new and usefulImprovefollowing is a specification.

This invention relates to improvements in connection plugs and moreparticularly to that class of connection plug commonly known as stageplug.

The principal object of the present invention resides in theprovision-of a means for clamping the conductor cable at its point ofentrance into the plug in such a manner as to relieve the binding screwsand bear wire of undue strain.

Another object of the invention is to provide a connection plug having ahinged cover which may be swung to open position by the removal of asingle screw thereby reducing the number of operations and amount oflabor necessary to gain entrance] to the device, to a minimum. a

A further object of the invention resides casing wherein the'insulatingblock may be readily removed to permit the same to beeasily repaired orreplaced in the event of injury or breakage.

A further and more specific object of the.

invention is to provide a, device which may be permanently attached to asupport .in-

such a manner as to provide an out-let box.

With these and other objects in View the invention consists in the novelarrangement, construction and combination of parts which will be fullyset forth in the following specification, claimed and illustrated in theacompanying drawings in which Fig. 1, is a perspective view of a pair oflugs constructed in accordance with this invention and illustrating thesame as they would appear when connected to ether.

,ig. 2, is atop plane view of one of the plugs showing the coverremoved.

Fig. 3, is a plan view of the interiorsof the cover.

Fig. 4, is a longitudinal sectional view through the plug illustratingthe cover in closed position and Fig. 5 is a'rear view of the plugillustrating in detail the cable clamping membars. 7

Referring to the drawings in detail the numeral 10 designates the mainbody of the 1 device comprising abase or bottom 11 provided near one endwith'a reduced tapered extension and formed integrally with the base arethe side walls 12. A rear wall 13 is formed at the reduced end of thetapered extension and formed centrally of said rear wall is a clampng-jaw 14 which co-operates with the additional clamping jaws to be morefully hereinafter described when the deviceis used with an ordinaryduplex cable.

Formed on the upper edge of the rear wall adjacent the jaw 14 are thesmaller clamping jaws 15 and formed at the upper rear edge "of the sidewalls 12 are ears 16 which are pierced to receive the pivot pin 17 ofthe device. A co-operating clamping jaw 18 is formed on the base orbottom 11 in direct alignment with the jaw 14 and is spaced inwardly fora short distance therefrom. A pair of stop lugs 19 are formed on theinner side of the bottom wall and act as limits'to prevent inwardmovement of the insulating block to be more fully pins 21, the innerends of which carry binding screws 22 which are contained withinrecesses 23 formed adjacent the rear edge of the block 20. This block isprovided at its longitudinal axis with openings 24and 25 and the opening24 is provided; with a counter-sink 26 to receive the head of a securingscrew 27 by means of which the block is secured in place. screw isreceived in a boss 28 forined on the under side of the bottom 11adjacent its for-- ward edge. 1

The cover for the device is designated by the numeral 29 and is providedwith pivot ears 30 at its 'rear end which fit between the ears 16 of thebody 10 and are pierced to receive the pivot pin 17.- A dependingclamping jaw 31 is formed cover at its rear. end and formed at oppositeends of the jaw 31 are the reduced clamping The point of this on theunder side of the jaws 32 it being understood that the jaws 31' and 32co-operate with the jaws 14 and .15

respectively.

an insulating plate 33, the ends of which extend beneath upset portions34 ofthe cover and an auxiliary securing; means coni the bottom 11 andthe forward edge of the sisting of a boss 35 .is formed centrally of therecess in which the insulating plate 33 is fitted and as illustratedin.Fig. 4, this boss is swedged upwardly so as topartially overhetheinsulating plate and thereby hold the same against displacement.

A pair'of bosses 36 are formed on the inner sidi:L of the cover 29- insuch a manner that w en it is so desired they. may be drilled to receiveattaching screws by means of which the device may be permanently securedto a support] The forward edge of cover 29 each are formed with reducedextens1ons 37 which are pierced as at 38 to 're- 'ceive the coversecuring screw 39 and it will be understood that the boss 28\ on thebottom 11 is counter-sunk as at 40 to receive the head of the screw 39while the opening 38 in the cover is internally threaded to receive thepoint of said screw. As illustrated in Fig. 4, the upper side of theblock 20 is..countersunk in axial alignment with the opening 25 toaccommodate a suitable retaining washer 41 by means of which the screw39 is prevented from falling from the openings 25 and 38 when the coveris loosened.

In operation it will be seen that the end of a cable is passed throughthe rear of the device between the jaws 14 and 31 and'the' ends of thecable secured beneath the binding screws 22. The cover is then closedand it will be seen that the cable will be firmly clamped so that nostrain on the plug will be taken up by the jaws and not transmitted tothe binding screws. Upon inspection of.

- Fig. 4 it will be seen that when the cable is between the clampingjaws, any outward pull on "the cable would tend to'hold the cover ontighter, thus, transmitting the undesirable pull on the binding screwsto the cover member where it aids in maintaining the same closed. Also,when the cover is"completely closed the depression in the cable memberwould in itself keep the cover closed as the jaw-member 31 would have tobe forced. over the bent portion of the cable when the cover was ralsed.Theclamping operation therefor becomes automatically efiective withtheclosing of the lid even though no screws are used to maintain the lid inclosed position. In the event that the device is used with single strandcables it will be obvious that the same may be passed through the spacebetween the jaws l5 and 32 and when the cover is closed the sameclamping action is obtained. Obviously the plug may be readily.

changed for use on. various cables by the loosening of the screw 39 soas to permit the cover to be swung open and thereby facili-' tating therapid substitution of one cable for another.

'hile in the foregoing there has beencable entering therebetween andmeans for I retaining the cover in closed relation with the casing. B

2. A connection plug comprising a casing,

a cover hinged to one end of, the casing, an

insulating and contact carrying block closing the opposite end of thecasingand clamping jaws carried by the casing and by the cover adjacentthe hinge, for holding said cable in distorted clampedposition- 3. Aconnection plug comprisin'ga casing, a cover hinged to one end of thecasing,an insulating and contact carrying block .cl0s ing the oppositeend of the casing, a pair of spaced cable clamps on the interior ofthecasing adjacent the hinge and a cooperating cable clamp carried by thecover adjacent its hinged end, said cooperating clamp lying in a planeintermediate the spaced ca'ble clamps. Signed at the city, count andState of New York, this-7th day of ay, 1920.

WILLIAM EDISON 'VPRICE.

